I was wondering if someone could help me. A co-worker creates a drawing in Adobe Illustrator and then converts it to AutoCAD, cleans it up in AutoCAD and then sends me the AutoCAD file where I open it up in AutoCAD 2005 LT. The drawing comes in fine but randomly when I move my cursor over the design and text it freezes my AutoCAD and gives me a Not Responding prompt but does not go away or catch up and I have to close down AutoCAD and then reopen it again. He uses AutoCAD 2004 LT. I was wondering if someone could help me figure out wy his drawings crash my AutoCAD program. Any help or advice would be much appreciated.